Light emitting device

Abstract

A light emitting device including three light emitting sources and a phosphor, with the three light sources consisted of following light emitting diodes (LED) emitting lights having different wavelengths. Wherein, two light sources are used to excite the phosphor to produce a distinct wavelength different from those of the two light sources. The distinct wavelength is blended with portions of the two light sources and a light source from another independent light source, and a blended light is released to obtain a white light.

1. A light emitting device comprising: three light emitting sources and a phosphor, with the three light sources consisting of light emitting diodes (LED) emitting lights having different wavelength; wherein:
 a first light source is formed by at least one first LED capable of emitting a blue light having a wavelength ranging between 360 nm and 480 nm; 
 a second light source is formed by at least one second LED capable of emitted a blue to green light having a wavelength ranging between 480 nm and 570 nm; 
 a third light source is formed by at least one third LED capable of emitting a red light having a wavelength ranging between 585 nm and 780 nm; 
 wherein the phosphor is BxOy 3 ; 
 and a phosphor is for absorbing lights having different wavelengths and emitted by the first and second light sources, and is excited to emit a distinct light having a wavelength distinct from those of the first and second light sources; wherein, the distinct light is blended with the red light emitted from the third light source and the lights emitted from the first and second light sources producing a blended light to obtain a white light; 
 the distinct light has a wavelength between 500 nm and 585 nm.